کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4430318 1619856 2011 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Differential patterns of antimicrobial resistance in population subsets of Escherichia coli isolated from waste- and surface waters
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم محیط زیست شیمی زیست محیطی
پیش نمایش صفحه اول مقاله
Differential patterns of antimicrobial resistance in population subsets of Escherichia coli isolated from waste- and surface waters
چکیده انگلیسی

The species Escherichia coli comprises different subgroups with distinct phylogeny, physiology and ecology and, thus, presumably, with different roles in antimicrobial resistance dissemination. E. coli strains isolated from raw and treated municipal wastewater and from urban water streams were characterized in terms of phylogenetic groups, antimicrobial resistance patterns and the presence of class 1 and class 2 integrons. Our main objective was to investigate the contribution of the different phylo-groups in antimicrobial resistance dissemination in urban waters. Groups A and B1 were predominant in all types of water, evidencing, respectively, the lowest and the highest resistance prevalence. Municipal wastewater treatment was accompanied by significant increases of ciprofloxacin and streptomycin resistance (p < 0.01). Antimicrobial resistance prevalence differed significantly between the different phylo-groups and within the same group, mainly in group A. Such differences contributed to explain the higher ciprofloxacin and streptomycin resistance rates observed in treated effluent in comparison with the raw wastewater. We conclude that the dynamics of the bacterial populations has a major role on the dissemination of antimicrobial resistance in the environment.

Research Highlights
► The antimicrobial resistance of E. coli from waste- and surface waters was compared.
► Differences between E. coli isolated from distinct types of water were observed.
► E. coli belonging to distinct phylogenetic groups had different resistance patterns.
► The dynamics of E. coli populations in waters influences resistance dissemination.
► Population subsets identification contributes to control resistance dissemination.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Science of The Total Environment - Volume 409, Issue 6, 15 February 2011, Pages 1017–1023
نویسندگان
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